Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The solubilities of adipic acid Cglutaric acid, and succinic acid in dimethyl adipate + methanol solvent mixtures were measured by the method of dynamic laser under 101.3kPa. The mass fraction of dimethyl adipate in the solvent mixtures ranged from 0.0 to 1.0 and the temperature ranged from 283.95 to 328.15 K. It was found that with the increasing of mass fraction for dimethyl adipate in mixed solvents, the measured solubilities of adipic acid Cglutaric acid, and succinic acid would decrease at the same temperature, and with the gradually increasing of temperature the measured solubilities of adipic acid Cglutaric acid, and succinic acid would increase at the constant proportion solvent mixtures. The experimental data were correlated by the Apelblat model, Eh model and the modified nonrandom two liquid (NRTL) activity coefficient model. Results showed that the largest values of relative average deviation (RAD) and root-mean-square deviations (RMSD) obtained by the three models were 4.49% and 0.35%, respectively. The three models were proven to give good representation of the experimental solubilities results. The result of Akaike Information Criterion (AIC) analysis shows that the Apelblat model is the best model to correlate the solubilities of adipic acid and succinic acid and the Eh model is the best model to correlate the solubilities of glutaric acid in dimethyl adipate + methanol mixed solvent.